TTYSFILE

1mconsole

1mtty02

1mtty03

1mtty04

0mtty05

0mtty06

06tty11

06tty12

01tty13

01tty14

TTY1FILE

1console

1mtty02

1mtty03

1mtty04

0mtty05

0mtty06

06tty11

06tty12

01tty13

01tty14

TTY2FILE

1mconsole

1mtty02

1mtty03

1mtty04

0mtty05

0mtty06

06tty11

06tty12

01tty13

01tty14

TTY3FILE

1mconsole

1mtty02

1mtty03

1mtty04

0mtty05

0mtty06

06tty11

06tty12

01tty13

01tty14

BOTCLEAN

   <<<<< LEFT_CLEAN SUBROUTINE >>>>>>>>>>>>>>>>>>>>>

LNEXT

ONELCLEAN

   <<<<< TERMINAL SCREEN DRAWING SUBROUTINE >>>>>>>>

UTERMINAL

                 TERMINAL               

NEXT

 CAL: #RC, 1

 $V1$

 <<<<<<< Standout Line Procedure >>>>>>>>>>

HILINE

     <<<<<< TIME POSE SUBROUTINE >>>>>>>>>

PAUSE

 CA: 1,45

 TH:  q - to quit, <CR> - to continue

 CAL: 1,45

If they want to quit, do so

GO

 Let's look once more at 

 our /etc/ttys file by using 

 the cat command:

 $PROMPT$

 That is correct!

 You've got it on the 2nd try.

 Good, you understand the concept.

 Please use cat to display /etc/ttys

 Please type cat /etc/ttys

 You will be helped this time!

FORGET1

 cat /etc/ttys                   

 Observe the result above.

 Remember, the first field is the mode which 

           if set to  1  indicates that login is enabled, 

           if set to  0  indicates login is disabled. 

 Assume that you have /etc/ttys in the

 editor.  Specify a new entry for the

 device tty17 to operate at 4800 (7)

 baud with login disabled, i.e.,

 to be used as a callout port.

 At the  : , type the required entry:

 :

 That is correct!

 You've got it on the 2nd try.

 Good, you understand the concept.

 Please type 07tty17

 Please type 07tty17

 You will be helped this time!

FORGET2

 07tty17                         

 Observe the result above.

 07tty17

 R:   <<<<< TERMINAL SCREEN DRAWING SUBROUTINE >>>>>>>>

 *UTERMINAL

 C: V1$ =:                                              

 C: RC = 3

 CA: 2,2

 T:                    TERMINAL                  

 *NEXT

 CAL: #RC, 2

 TH: $V1$

 C: RC = RC + 1

 J(#RC <= 12): NEXT

 CA: 13,2

 T:                                              

 E:

NEXT3

 $PROMPT$

     <<<<<< TIME POSE SUBROUTINE >>>>>>>>>

PAUSE

If they want to quit, do so

PAGETURNER

If they want to quit, do so

    <<<<<< 4 BOTTOM LINES CLEANING SUBROUTINE >>>>>>

ENCORE5

    <<<<<< REVIEW CLEANING SUBROUTINE >>>>>>

ENCORE

    <<<<<< CLEAN THE INSIDE OF BOUNDED ARE ONLY >>>>>

BOX

                          COMMAND                       

GO2

 kill

 SYNTAX

       kill  [ - signo ] process ID ...

 FUNCTION

       Terminate active process(es) on the system.  kill sends 

       a signal 15 (terminate) to the specified process.  

       kill may be used to issue a HANGUP signal (-HUP or -1) for 

       the process id 1 which forces init to close and open 

       terminals according to what is in /etc/ttys. 

 To create a login process for the 

 device you just defined as a 

 callout port, enter the command to 

 issue a HANGUP signal.

 $PROMPT$

 That is correct!

 You've got it on the 2nd try.

 Good, you understand the concept.

 Please use kill with a -HUP or -1

 signal for process 1

 Please type kill -1 1 or kill -HUP 1

 I will help you this time.          

 $PROMPT$

FORGET3

 $PROMPT$kill -1 1                

 Observe the result on the terminal!

 $PROMPT$                           

 At this point you should be able to use

 tty17 as a callout port.